One problem is that the FROM field in an e-mail can contain whatever the sender cares to place in it. There's no check, the field just gets passed through the system intact.

I had several "Failed delivery" type messages in my box late last night, which aroused my suspicions immediately. The only e-mail I sent yesterday was to Bill, and I know he received it correctly.

P.S. Checked my e-mail only two minutes ago, but two more messages arrived while I was typing this post. One is "returned mail" from some MAILER-DAEMON again, the other from a cryptic address NAVMSE-LZNTSRV1 something or other, telling me that Norton Anti-Virus has detected a virus in an e-mail I just sent. Yeah, right. [Linked Image]


[This message has been edited by pauluk (edited 08-20-2003).]